Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b8f9c9010615128…

MALICIOUS

PDF

79.8 KB Created: 2021-09-05 01:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5f5539b66e50aeee0dce3d00f99ba841 SHA-1: 132cf3936cbcf82194e8b949da46ccba8043f025 SHA-256: 7b8f9c90106151286d363d300d2405390c6330a702906ecdbe634920ca5a3f3e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, many of which host further PDF files, suggesting a phishing or malware distribution campaign. The presence of a 'download button' heuristic and ClamAV detection as Pdf.Phishing.Trojan indicates a malicious intent to trick users into downloading harmful content. While no scripts were directly extracted, the overall structure and heuristic firings strongly suggest a phishing attack leveraging external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://aawyx.com/sites/default/imageuser/file/xubimoleveza.pdf In PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/9seej1uq7bvuekjpa2eojl3bkj/16274279020.pdfIn PDF document text
    • http://greenvisioninternational.gm/userfiles/file/welibomozoninapufunusub.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/62942357003.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/li4trrt2spq54tfia0nfv2n9o4/79016839509.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f6fa61170---rexazigatujaxukodixabebir.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/38686729276.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/wafal.pdfIn PDF document text
    • https://gtijsr.com/userfiles/file/susisimenajuvixigabokime.pdfIn PDF document text
    • https://incense888.com/uploads/files/202108310030119342.pdfIn PDF document text
    • https://kermanrooz.com/img/files/toxiwigof.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/86818306680.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb537af1c7---sukirazuguranuramipiwo.pdfIn PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/dolokibavu.pdfIn PDF document text
    • http://archetipoingegneria.it/userfiles/files/selomaf.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/687750e2896d50b9cfe42cd1e90b1d03/62025090843.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612d45be9bd36---37988743382.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/43344763491.pdfIn PDF document text
    • http://placc.info/up_image/lawodedadafulug.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160837a0be28ca---fewopudusixopukefovusu.pdfIn PDF document text
    • https://kawanmto.org/contents//files/vomesibenaburabaletim.pdfIn PDF document text
    • http://artepcb.com/upload/files/javewagivopurex.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf2e1919db1---sekaporojobuzufabuzawepuk.pdfPDF link annotation
    • https://kisikana.hr/UserFiles/files/78411972937.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=hamlet+ebook+free+pdf+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE35 10708 bytes
SHA-256: 1d59138773d214afdd99ec26ce977d79c1fa348c33527ca469cbe563d6304937
font_02_sfnt_off0001068d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068D 16696 bytes
SHA-256: 9f0771bc822385ab360a3d2f723f46c9805da4880f9625dcb2e29167e05d0a66